1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Electret microphone noise

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by hoghunter, Jul 13, 2017.

  1. hoghunter

    hoghunter Member

    Joined:
    Jun 29, 2017
    Messages:
    195
    Likes:
    2
    Location:
    Texas
    Here's the back side of the board:
    [​IMG]
     
  2. audioguru

    audioguru Well-Known Member Most Helpful Member

    Joined:
    Mar 16, 2004
    Messages:
    32,434
    Likes:
    933
    Location:
    Canada, of course!
    ONLINE
    ebay knows nothing about electronics and knows nothing about audio. They know only about cheap Chinese junk.
    I wonder why the MAX4466 datasheet does not say it is low noise? Look at the differences between it and a good audio opamp:
     

    Attached Files:

  3. hoghunter

    hoghunter Member

    Joined:
    Jun 29, 2017
    Messages:
    195
    Likes:
    2
    Location:
    Texas
    Wow, big difference. I wish I had known this a few weeks ago. Thanks for the insight and now I know what to look for.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. dr pepper

    dr pepper Well-Known Member

    Joined:
    Oct 6, 2008
    Messages:
    4,641
    Likes:
    245
    Location:
    North west UK

    I made the mistake of buying some op amps from china of ebay not so long back, they are marked as texas instruments but I wonder if they really are, the first types I used didnt even work, a manky old thing salvaged from a pcb worked better (and still is).
     
  6. hoghunter

    hoghunter Member

    Joined:
    Jun 29, 2017
    Messages:
    195
    Likes:
    2
    Location:
    Texas
    Thanks for the heads up guys, I assumed they were all made the same....:confused:
     
  7. audioguru

    audioguru Well-Known Member Most Helpful Member

    Joined:
    Mar 16, 2004
    Messages:
    32,434
    Likes:
    933
    Location:
    Canada, of course!
    ONLINE
    There is at least one huge city in China where thousands of companies make nothing but fake electronic parts that are sold on ebay and other Chinese auction sites.
    Here is an example of a cheap Chinese Li-Ion battery sold on ebay:
     

Share This Page